Parse gitignore when building new project from template

Avoids cloning the .git subdirectory and will also avoid any files
listed as ignored in the .gitignore file.  It will copy both gitignore
and gitattributes into the new project

Fixes https://gitlab.com/kicad/code/kicad/-/issues/16507

kicad/project_template.cpp

@@ -28,6 +28,8 @@
 #include <wx/txtstrm.h>
 #include <wx/wfstream.h>
 #include <wx/log.h>
+#include <wx/textfile.h>
+#include <unordered_map>
 
 #include <wildcards_and_files_ext.h>
 #include "project_template.h"
@@ -76,13 +78,19 @@ public:
     FILE_TRAVERSER( std::vector<wxFileName>& files, const wxString& exclude ) :
             m_files( files ),
             m_exclude( exclude )
-    { }
+    {
+    }
 
     virtual wxDirTraverseResult OnFile( const wxString& filename ) override
     {
         wxFileName fn( filename );
         wxString   path( fn.GetPathWithSep() );
 
+        EnsureGitFiles( path );
+
+        if( IsIgnored( path, fn.GetFullName(), false ) )
+            return wxDIR_CONTINUE;
+
         bool exclude = fn.GetName().Contains( "fp-info-cache" )
                        || fn.GetName().StartsWith( FILEEXT::AutoSaveFilePrefix )
                        || fn.GetName().StartsWith( FILEEXT::LockFilePrefix );
@@ -90,24 +98,19 @@ public:
         if( !exclude )
             m_files.emplace_back( wxFileName( filename ) );
 
-        if( path != m_oldPath )
-        {
-            const wxString gitfiles[] = { wxT( ".gitignore" ), wxT( ".gitattributes" ) };
-
-            for( const wxString& file : gitfiles )
-            {
-                if( wxFileExists( path + file ) )
-                    m_files.emplace_back( wxFileName( path + file ) );
-            }
-
-            m_oldPath = path;
-        }
-
         return wxDIR_CONTINUE;
     }
 
     virtual wxDirTraverseResult OnDir( const wxString& dirname ) override
     {
+        wxFileName dir( dirname );
+        wxString   parent = dir.GetPathWithSep();
+
+        EnsureGitFiles( parent );
+
+        if( dir.GetFullName() == wxT( ".git" ) || IsIgnored( parent, dir.GetFullName(), true ) )
+            return wxDIR_IGNORE;
+
         wxDirTraverseResult result = wxDIR_IGNORE;
 
         bool exclude = dirname.StartsWith( m_exclude ) || dirname.EndsWith( "-backups" );
@@ -115,6 +118,7 @@ public:
         if( !exclude )
         {
             m_files.emplace_back( wxFileName::DirName( dirname ) );
+            EnsureGitFiles( dirname + wxFileName::GetPathSeparator() );
             result = wxDIR_CONTINUE;
         }
 
@@ -122,9 +126,68 @@ public:
     }
 
 private:
+    void EnsureGitFiles( const wxString& path )
+    {
+        if( m_gitIgnores.find( path ) != m_gitIgnores.end() )
+            return;
+
+        wxString gitignore = path + wxT( ".gitignore" );
+
+        if( wxFileExists( gitignore ) )
+        {
+            wxFileInputStream input( gitignore );
+            wxTextInputStream text( input, wxT( "\x9" ), wxConvUTF8 );
+
+            while( input.IsOk() && !input.Eof() )
+            {
+                wxString line = text.ReadLine();
+
+                line.Trim().Trim( false );
+
+                if( line.IsEmpty() || line.StartsWith( wxT( "#" ) ) )
+                    continue;
+
+                m_gitIgnores[path].push_back( line );
+            }
+
+            m_files.emplace_back( wxFileName( gitignore ) );
+        }
+        else
+        {
+            m_gitIgnores[path] = {};
+        }
+
+        wxString gitattributes = path + wxT( ".gitattributes" );
+
+        if( wxFileExists( gitattributes ) )
+            m_files.emplace_back( wxFileName( gitattributes ) );
+    }
+
+    bool IsIgnored( const wxString& path, const wxString& name, bool isDir )
+    {
+        auto it = m_gitIgnores.find( path );
+
+        if( it == m_gitIgnores.end() )
+            return false;
+
+        for( const wxString& pattern : it->second )
+        {
+            bool     dirOnly = pattern.EndsWith( wxT( "/" ) );
+            wxString pat = dirOnly ? pattern.substr( 0, pattern.length() - 1 ) : pattern;
+
+            if( dirOnly && !isDir )
+                continue;
+
+            if( wxMatchWild( pat, name ) )
+                return true;
+        }
+
+        return false;
+    }
+
     std::vector<wxFileName>&                            m_files;
     wxString                                            m_exclude;
-    wxString                 m_oldPath;
+    std::unordered_map<wxString, std::vector<wxString>> m_gitIgnores;
 };
 
 
@@ -141,13 +204,12 @@ std::vector<wxFileName> PROJECT_TEMPLATE::GetFileList()
 
 wxString PROJECT_TEMPLATE::GetPrjDirName()
 {
-    return m_basePath.GetDirs()[ m_basePath.GetDirCount() - 1 ];
+    return m_basePath.GetDirs()[m_basePath.GetDirCount() - 1];
 }
 
 
 PROJECT_TEMPLATE::~PROJECT_TEMPLATE()
 {
-
 }
 
 
@@ -163,10 +225,9 @@ wxBitmap* PROJECT_TEMPLATE::GetIcon()
 }
 
 
-size_t PROJECT_TEMPLATE::GetDestinationFiles( const wxFileName& aNewProjectPath,
+size_t PROJECT_TEMPLATE::GetDestinationFiles( const wxFileName& aNewProjectPath, std::vector<wxFileName>& aDestFiles )
-                                              std::vector< wxFileName >& aDestFiles )
 {
-    std::vector< wxFileName > srcFiles = GetFileList();
+    std::vector<wxFileName> srcFiles = GetFileList();
 
     // Find the template file name base. this is the name of the .pro template file
     wxString basename;
@@ -174,8 +235,7 @@ size_t PROJECT_TEMPLATE::GetDestinationFiles( const wxFileName& aNewProjectPath,
 
     for( wxFileName& file : srcFiles )
     {
-        if( file.GetExt() == FILEEXT::ProjectFileExtension
+        if( file.GetExt() == FILEEXT::ProjectFileExtension || file.GetExt() == FILEEXT::LegacyProjectFileExtension )
-            || file.GetExt() == FILEEXT::LegacyProjectFileExtension )
         {
             if( !basename.IsEmpty() && basename != file.GetName() )
                 multipleProjectFilesFound = true;
@@ -224,8 +284,7 @@ bool PROJECT_TEMPLATE::CreateProject( wxFileName& aNewProjectPath, wxString* aEr
 
     for( wxFileName& file : srcFiles )
     {
-        if( file.GetExt() == FILEEXT::ProjectFileExtension
+        if( file.GetExt() == FILEEXT::ProjectFileExtension || file.GetExt() == FILEEXT::LegacyProjectFileExtension )
-            || file.GetExt() == FILEEXT::LegacyProjectFileExtension )
         {
             if( !basename.IsEmpty() && basename != file.GetName() )
                 multipleProjectFilesFound = true;
@@ -249,8 +308,7 @@ bool PROJECT_TEMPLATE::CreateProject( wxFileName& aNewProjectPath, wxString* aEr
         {
             // Don't rename drawing sheet definitions; they're often shared
         }
-        else if( destFile.GetName().EndsWith( "-cache" )
+        else if( destFile.GetName().EndsWith( "-cache" ) || destFile.GetName().EndsWith( "-rescue" ) )
-                    || destFile.GetName().EndsWith( "-rescue" ) )
         {
             currname.Replace( basename, aNewProjectPath.GetName() );
         }